Lamp.



No 814,361. PATBNTED MAR. 6, 1906. T. D. DAVIS.

LAMP.

APPLICATION FILED SEPT. 2. 1964- 2 SHEETS-SHEET I.

ww- (m PATENTED MAR, 5, 1906 T. D. DAVIS.

LAMP.

APPLIUATION 11.51 $22122. 1904.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented March 6, 1906.

Application filed Beptemiaer 2. 1904. Serial No. 223.078.

To all whom it may concern.-

Be it known that I, THEODORE D. DAVIS, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Lamp, of which the following is a specification.

This invention relates to lam s, and has for its object to provide a novel amp which is simple and inex ensive to manufacture, which is perfectly sa e and non-explosive, and in which the combustion is perfect, so that the lamp gives out no smoke or odor.

My improved lamp com rises a chamber which is adapted to be fille with asbestos or some similar absorbent material, said chamber having one or more openings in its top through which tufts or portions of the absorbent material may be drawn to constitute wicks and an air-tube extending through said chamber to supply air to the flame, the upper end of said tube extending throu h the to of the chamber and terminating a jacent the wick-openings. The result of this construc tion is that when the lam is lighted the flame is directly over the air-tu e, so that the suply of air is delivered through the latter ungel the flame. By means of this construction a pure white flame is generated without the presence of any odor or smoke.

Another feature of my invention relates to the manner in which the chimney is held in lace.

p According to my invention I have provided a plurality of series of spring-fingers which are ada ted to engage the chimney in two different p aces, one above the other, and thus hold the chimney much firmer than in the ordinary lamp.

Referring to the drawings, Figure 1 is a vertical sectional View throu h a lamp embodying my invention, said lamp having a chimney applied thereto. Fig. 2 is a top lan view of the cap of the font or chamber. Fig. 3 is a vertical sectional view ofrthe oilchamber detached from the base. Fig. 4 is a side view of the base separated from the oilchamber. Fig. 5 is a section on the line m as, Fig. 4. Fi 6 is a detail of the top of the oilchamber, showing the cap detached. Fig. 7 is a bottom plan view of the air-tube, showing the valve for controllin the supply of air therethrou h. Fig. 8 is a etail showin one way of mailing the spring-fingers for he ding the chimney. Fig. 9 is a vertical section through the base, showing the form of finger illustrated in Fig. 8. Figs. 10 and 11 show a modification of my invention.

My improved lamp comprises a base 3 and a chamber 4, adapted to be filled with some suitable absorbent, such as asbestos fiber or any other similar material which has the ca pacity of absorbing volatile oil. The chamer 4 is shaped at its upper end to resent a neck 6,0verwhicha suitable cap 7 is p aced,the material of the neck bein indented to form the locking-groove 8, as s own in Fig. 6, the cap 7 being similarly indented to form a looking projection or tip 9, which is adapted'to enter the groove, and thus lock the cap in place. In the form of the invention shown 1n Fig. 1 the material of the neck 6 is bent back upon itself to form the downwardly-extendin flan e 10, the lower edge of said flange eing ent horizontally to form an annular horizontal flan e 11.

The cap 7 is rovided with the bell-shaped flan e 12, whic is secured at its upper edge to t e top of the ca and the lower edge of which rests on the horizontal flange 11, as seen in Fig. 1. The top of the cap is provided with one or more 0 enings or apertures 13, through which tn ts or ortions of the absorbent material may be pu led to constitute a wick.

Extending through the chamber 4 is an air-tube 14, which is preferably conical in shape, the lower end of said air-tube being herein shown as soldered or otherwise secured to an u turned flange 15, formed around a contra opening in the bottom 16 of the chamber. The upper end 17 of said-tube extends just through the cap 7, and in the present form of my invention it occupies a position between the two wick-openings 13, as best seen in Fig. 2.

Secured to the cap 7 is a wall or flange 18, which encircles the wick-o ening 13 and the upper end of the tube 17. l' he space inclosed by said wall forms a mixing-chamber in which the air and gasified oil is mixed prior to being burned, as will be more fully hereinafter described.

Surrounding the upper end of the air-tube 14 is a collar or washer 19, which lies within the bellshaped flange 12 and which serves to prevent the tufts of absorbent material which are drawn through the openings from settling away from the c p 7.

' 20 desi ates a valve at the lower end of the air-tub: 14. Said valve is rovided with a plurality of openings 21, which are herein shown as ta ered, and it cooperates with a erforated isk 22, extending across the ower end of the air-tube 14. The valve is provided with a suitable handpiece 23, by

means of which it may be operated through the open bottom of the base. The graduated or taperin openings provide a means for nicely regu ating the amount of air delivered to the air-tube.

The base 3 is a cylindrical structure open at both top and bottom and is provided with means for su porting and holding the chamber 4 and a so other means for suporting and holding the chimney 24. W de this base may have any suitable or usual construction, I prefer to make it substantiall as herein shown, wherein it is provided wit the inwardly-extending su port 25, on which both the font and the chimney rest. Said supports can conveniently be made by slitting the metal in the wall of the base, as shown at 26, Fig. 4, and thereafter bending the tongue thus formed inwardly to constitute lateral projections 25. i

The chamber 4 is provided at its base with the vertical flange 27, which is adapted to rest on the supports 25, and said flange may be soldered or otherwise secured to the supports 25 or not. Said flange 27 is provided with a plurality of apertures 28, through which air is supplied to the air-tube 14.

I prefer to provide the base with means for engaging the chimney at two different points along its length. As shown in Fig. 3, the side walls of the base are slitted at 30 and 31 to form fingers 32 and 33, which fingers may be bent inwardl to constitute means for engaging and holding the chimney. It will be noticed that the fingers 33 extend u wardly, whilethefingers 32 extenddownwar ly. The fingers 32 therefore engage the cylindrical portion of the chimney near the bottom thereof, while the fingers 33 engage this portion near or adjacent to the bulge.

Fi s. 8 and 9 show another wa in which the c imney-holding fingers may be formed. In this form of the invention the side walls of the base are cut to form ong extended fingers 35, which are subsequent] bent over upon themselves, the ends 36 o the fingers being passed through apertures 37. These fingers are so shaped that the ends 36 and also the bulged portion 38 thereof engage the lamp-chimney.

To center the chimney, I may, if desired, provide the base with an annular inclined surface 39, on which the bottom of the chimney rests, said surface 0 crating to properly center the chimney. here the surface 39 is used, it is not necessary to employ the downwardly-extending fingers '32, although I prefer to employ the upwardly and downwardly extending fingers.

In order to prevent the oil from spreading over the surface of the chimney by capillary attraction when the lamp is laid away, I provide a gutter which is constructed to catch any oil which may tend to spread from the rojecting tufts of the absorbent material.

his gutter may either be placed on the ca as shown in Fig. 1, or may be formed on tflb body of the chamber, as shown in Fig. 11. In the construction shown in Fig. 1 the gutter is formed by turnin upwardly the lower edge of the flange 40 o the cap, thereby to form the gutter 41. To fill the lamp, the cap 7 is removed and a suflicient quantity of oil is then oured into the chamber 4 to saturate the absorbent material therein. The cap is then replaced and a portion of the absorbent material drawn through the wick-openings 13 a sufficient distance to constitute wicks. When the lamp is lighted, a pure white flame appears a little distance above the cap. The 011 which rises to the ends of the wick by ca illary attraction is converted into gas in t e mixing-chamber, and this gas is mixed with air supplied through the air-tube 14.

It Wlll be noted that the air is supplied to the flame directly underneath the latter, and in this respect my lam differs from any lamp with which I am now amiliar. I regard th1s as very important, because by thus deliver ing the air directly beneath the flame perfect combustion is-secured, and the lamp is therefore absolutely free from odor or smoke. The only oil in the lamp is that which is absorbed by the absorbent material 5, and therefore the lamp is an absolutely safe one, because even if it becomes overturned there is no oil to spill out and become ignited.

The lamp is especially designed for a nightlamp, although it may be used for ordinary illuminating purposes by properly proportioning the size of the parts.

Various changes in the construction of the device may be made without departing from the invention.

What I claim, and desire to secure by Letters Patent, is-

1. In a lamp, a chamber having wick-receiving openings in its top through which 0 enings tufts of the wick material within t e chamber are adapted to roject, the space above the chamber throng which the tufts roject bein free and entirely open, where y when the amp is burning the flame bridges the space between the tufts, and means to deliver air through the top of the chamber between the openings and directly beneath the flame.

2. In a lamp, a chamber having wick-receiving openings in its top through which 0 enings tufts of the wick material within t e chamber are adapted to project, the space above the chamber through which the tufts roject bein free and entirely open, whereby when the amp is burnin the flame bridges the space between the tu ts, and an air-tube extending through the chamber and I to terminating at its top between said wick-receiving openings and directly beneath the flame.

3. In a lamp, a chamber having a plurality of openings in its top through which wicks extend, a wall surrounding said openings and forming an uncovered space into which the wicks project, whereby when the lamp is burning the Ilame bridges the space between the wicks, and an air-tube extending through the chamber and terminating at its top between said openings and directly underneath the flame.

4. In a lamp, a chamber having a plurality of openings i n its top through which wicks extend, a wall surrounding said openings and forming an uncovered space into which the wicks project, whereby when the lamp is burning the flame bridges the space between the wicks, and a tapering air-tube extending through the chamber and terminating at its top between said openings and directly underneath the flame.

5. In a lamp, a chamber having an open top, a cap to be applied to said top, said cap having one or more openings, a flange or wall surrounding said openings and inclosing an uncovered mixing-chamber, and an air-tube extending through the chamber and delivering air into the mixing-chamber.

e. in a lamp, a chamber adapted to be filled with material for absorbing oil, said chamber being shaped to present a neck surrounding an opening, the material of the chamber at the neck being bent backwardly to form an annular space surrounding the neck, and a cap to encircle said neck, said 'cap having a portion to engage the backwardlybent portion of the neck.

7. In a lamp, an oilcharnber, said chamber being shaped to form a neck surrounding an opening, said neck having an annular flange projecting inwardly therefrom, and a cap to sit over and embrace the neck, said cap having a flange, to fit within the neck and engage the horizontal flange.

8. In a lamp, an oil-chamber having an opening surrounded by a neck, a cap to sit over said neck, said cap being provided with an annular gutter, and a plurality of se arate wick-receiving openings through whic preject tuitsof wick material filling the chamber.

9. In a lamp, a holder having punched therefrom a plurality of of tin gets, the fingers of one series on 'aging the chimney nearer the base thereo' than those of the other series.

10. In a lamp, a cylindrical member to support a chimney, said cylindrical member having portions punched therefrom to form spring-fingers to engage the chimney.

11. In a lamp, a cylindrical member to support a chimney, said cylindrical member having portions punched therefrom to engage the chimney at different points along its length.

12. In a lamp, an annular base having chimney-holding fingers punched from its sides, and a wick-containing chamber removably supported by the base, said wickcontaining chamber having at its upper end wick-receiving openings.

13. In a lamp, an annular base having means to support a chimney, and chimneyholding lingers punched from the walls thereof, a wick-receiving chamber sitting within the base and removably supported thereby, said chamber having a plurailty of wick-receiving openings in its top, and wick material loosely filling said chamber and extending through said openings.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THEODORE D. DAVIS.

,3; Si EDWARD D, Buss, WALTER A. LAMBERT. 

